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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Line Items] |  |
Limited net operating loss carryforwards | $ 1,400,000 |
Accrued interest related to unrecognized tax benefits | 0 | $ 0
Decrease in net deferred tax asset position due to change in tax rate | 15,800,000 |
Federal |  |
Income Tax Disclosure [Line Items] |  |
Net operating loss carryforwards | 135,500,000 |
Credit carryforwards | 1,700,000 |
State |  |
Income Tax Disclosure [Line Items] |  |
Net operating loss carryforwards | 109,900,000 |
Credit carryforwards | $ 1,900,000 |

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